Identifier: 032936."Galvanized steel piezometers - perforated at different depths - to allow measurement of water levels at different horizons in a multi-aquifer system. The piezometers originally extended much higher to contain artesian flows". West Coast - Latitude:-32° 57' 25.2" S; Longitude: 18° 10' 33.6" E.

Identifier :033316 "PVC piezometers, with screens - surrounded by filter sand - at different depths, to allow measurement of water levels at different horizons in a multi-aquifer system. The piezometers are encased with bentonite to prevent groundwater flow between the different horizons. The bentonite is capped with concrete". West Coast - Latitude:-33° 8' 15.108" S; Longitude: 18° 11' 55.284" E.